{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "Bilateral vagotomy and sympathectomy or prior administration of a ganglion blocker failed to inhibit the occurrence of the ketamine - induced tachycardia , while it was completely abolished in the reserpinized dogs or by a prior injection of a beta - blocking agent into the SA node artery ."}
{"Chemical": ["ketamine"], "Disease": ["tachycardia"]}